Plastic recycling pelletizing
Choose the route from the polymer, feed form, bulk density, contamination profile and required pellets—not from a single generic capacity table. URIDGE separates rigid-plastic, low-bulk-density compaction and WPC compounding applications.
Three distinct routes
These systems solve different feeding and processing problems. A final line is defined only after representative material and the required pellet application are reviewed.
For prepared rigid thermoplastic regrind where conventional controlled feeding can be used.
For lightweight feed that bridges or feeds inconsistently through a conventional hopper.
For preparing defined wood-plastic compound granules for downstream profile or product extrusion.
Selection matrix
The table is a screening tool. It does not replace trials, screw selection or an approved process specification.
| Feedstock condition | Primary feeding challenge | Route to evaluate | Items that still require confirmation |
|---|---|---|---|
| Prepared rigid regrind Known thermoplastic, controlled particle size | Stable metering, melting, degassing and contamination loading | Waste rigid plastic pelletizing line | Polymer identity, particle size, moisture, filtration duty, additives and pellet use |
| Film, woven bags or light fluff Low and variable bulk density | Bridging, inconsistent feeding and air carried with the feed | Compaction pelletizing system | Bulk density, moisture, printing or coating, contamination, compaction behavior and cut method |
| Wood-plastic formulation Defined polymer and plant-based filler | Metering, dispersion, moisture management and thermal history | WPC compounding and pelletizing line | Formulation, filler size and moisture, additives, target compound and downstream extrusion route |
Capacity boundary: throughput is agreed for a defined feedstock, configuration and acceptance test. A nominal model range must not be treated as a guaranteed result for every material.
Engineering inputs
These inputs determine the feeding, screw, vacuum, filtration, cutting and downstream handling sections.
Confirm polymer, additives, feed form and size, bulk density, moisture and representative contamination.
Establish melting and mixing needs, degassing demand, thermal sensitivity and acceptable residence history.
Match filtration to contaminant loading and choose the pelletizing method from polymer behavior and pellet requirements.
Agree sampling point, throughput basis, pellet criteria, test material, test duration and reporting method.
Configuration choices
Neither should be selected only from a product name. The final choice follows the approved material sample and pellet specification.
Can suit controlled contamination where planned screen changes are acceptable.
May be evaluated where contaminant loading and production continuity justify greater automation.
Upstream melt pressure helps define filter loading and the agreed change or discharge logic.
A common route for selected recycling applications, subject to polymer and melt behavior.
Can provide a visible, accessible strand route where stable strand formation is achievable.
May be evaluated for applications whose polymer, output and pellet requirements support the added system complexity.
Scope boundaries
Clear boundaries improve both project acceptance and search intent.
Approved feeding, extrusion, degassing, melt filtration, pellet cutting, cooling, dewatering, screening, conveying and storage sections—only as listed in the final scope.
Sorting, washing, shredding, crushing, material drying, compounding, SSP and downstream product extrusion are included only when specifically engineered and listed. Pelletizing alone does not establish food-contact, medical or final-product compliance.
Published project evidence
Existing URIDGE project pages provide context while retaining their own material and performance boundaries.
Rigid-plastic reference
A published project page for a complete HDPE rigid-plastic pelletizing line in Peru. Its configuration is evidence for that project, not a guarantee for different materials.
View the published Peru project →Frequently asked questions
Answers are intentionally conditional because material and acceptance criteria control the equipment configuration.
Prepared HDPE, PP, ABS, PC or PA rigid regrind is normally evaluated for a conventional feeding and extrusion route. Material identity, feed size, moisture, contamination and the target pellet application must be confirmed before configuration.
A compaction route is considered for low-bulk-density feed such as PE or PP film, woven bags and selected fiber or fluff that is difficult to feed steadily through a conventional hopper.
Filter selection depends on polymer, contamination type and loading, required filtration fineness, acceptable melt-pressure variation, screen-change practice and the intended pellet use.
No. Output must be agreed for a defined material and test condition. Bulk density, moisture, contamination, formulation, filtration duty and pelletizing method can all change actual throughput.
Provide representative material, polymer and additives, feed form and size, bulk density, moisture and contamination, target output, pellet application, utilities, factory space and the proposed acceptance method.
Start with a representative sample
Send material photos or samples, polymer and additives, bulk density, moisture, contamination, required output, pellet application, utilities and available layout.